11 Questions
Which coal classification has a high percentage of fixed carbon and a low percentage of volatile matter?
Anthracite
Which coal classification is the largest group of coals and tends to produce a sticky, cohesive mass when heated?
Bituminous
Which coal classification has lower percentages of fixed carbon and higher percentages of volatile matter, making them burn faster and have a lower ignition temperature?
Sub-bituminous
Which type of coal has the highest calorific value?
Anthracite
Which type of coal is not well suited for stoker firing?
Bituminous
Which type of coal is black in color and disintegrates when exposed to air?
Sub-bituminous
Which type of coal has a layered structure and often contains remnants of woody fibers?
Lignite
Which equation shows the combustion of hydrogen?
2H2 + O2 -> 2H2O
What is the mass of dry flue gas produced per kilogram of fuel in Example 15?
16.44 kg
What is the actual air supplied per kilogram of fuel in Example 15?
15.98 kg
What is the stoichiometric air per kilogram of fuel in Example 15?
2.47 kg
Test your knowledge on coal classifications and combustion characteristics with this quiz. Learn about the different groups and sub-classifications of coal, as well as how to analyze combustion equations. Get ready to become an expert in coal properties and combustion!
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